Engine starting system.



C. F. KETTERING L W, A. CHRYST.

ENGINE STARTING SYSTEM.

APPLICATION FILED MAR. 1. 191B.

1 ,273,87 1 Patented July 30, 1918.

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CHARLES F. KETTERING AND WILLIAM A. CHRYST, OF DAYTON, OHIO, ASSIGNORST0 THE DAYTON ENGINEERING LABORATORIES. COMPANY, A CORPORATION 0F OHIO.

ENGINE STARTING SYSTEM,

Specification of Letters Patent.

Patented July 30, 1918.

Original application filed September 13, 1813, Serial No. 789,641.Divided and this application filed March 1,

` 1916'. Serial No. 81,410.

To all whom t may concern:

Be it known'that we, CHARLES F. Knr'rn'u- ING and l/VILLIAM A. CHRYs'r,citizens lof the United States of America, residing at Dayton, county ofMontgomery, and State of O hio, have invented certain new and usefulImprovements in Engine Starting Systems, of which the following is afull, clear, and exact description.

This invention relates to a system of devices adapted to be combinedwith combustion or explosion engines, for supplying power to start anengine, and the engine when thus started, may be arranged to store uppower for similar future starting operations, and other purposes. i

Among the objects of the present invention is to provide an electricmachine of simplified construction, which may be manufactured at lowcostand easily combined with the engine' upon which it is to be installed. Y

In carrying out theobjects of the present invention, an electric machineis provided, which is so mounted upon the .apparatus with which themachineis combined, that a non-magnetic portion of the apparatus servesasa base for the electric machine to which the pole pieces are directlyattached in a rigid manner without providing the apparatus with anyspecial mounting for the machine, and also eliminating the separatenon-magnetic base usually placed intermediate the electric machine andthe apparatus to which the machine is attached.

The structure may be further simplified by mounting the commutatorbrushes of the electric machine upon a single element, which, whenassembled in position, not only maintains the commutator brushes incorrect position, but valso functions as a cover for the end housingofthe electric machine.

The present application is a division of our co-pen'ding'v application,Serial No. 789,641, filed September 13, 1913 for engine starting system,Patent No. 1,250,188, dated Dec. 18, 1917.

Further objectsv and advantages of the present invention will beyapparent from the following specification, reference being had to theaccompanying drawings, wherein a preferred form of the present inventionis set forth.

vReferring to the drawings:

Figure 1 is a top plan view of the chassis of an automobile, includingthe engine and the electric machine which forms a part of the presentinvention.

Fig. 2 is a fragmentary detail view in section of an engine having anelectric machine included in the present invention installed thereon.

Fig. 3 is a detail sectional view of the electric machine applied to anengine having a nonemagnetic crank case or portion.

Referring to the drawings and more especially to Figs. 1 to 3 inclusive,the numeral 2O designates the side frames of the chassis, while thenumeral 21indicates the engine, provided with a flywheel 22, having gearteeth 28 cut'in its periphery.

The type of chassis and engine construction shown in the presentinstance is similar to that manufactured and placed on the market by theBuick Motor Car Company.

The dynamo electric machine is designated by the numeral 24, and isadapted to be driven as a generator, during thenormal operation ofthe'engine, by means of the timing gears 25, which transmit motion tothe generator through the shaft 2G, as is clearly shown in Fig. 1.

The location and larrangement of the dynamo electric machine is` similarin certain respects to thatdescribed. illustratedl and claimed in thecopending applications of Charles F. Kettering, Serial No. 621,512,filed April 17, 1911; Serial No. 721,237, filed September 19, 1912; andthat of Charles F. Kettering and lVilliam A. Chryst, Serial No. 778,934,iilcd July 14, 1913; and U. S. patent to Charles F. Kettering, No.1,150,523, dated August 17, 1915.

In certain types of automobiles, such as for instance in automobiles ofthe Buick type, the assembly of the chassis and the associatedmechanisms, such as the engine, is such that an extremely limited spaceis provided for the installation of systems of the present type.

In the type of engine used in automobiles of the above mentioned type,the crank case or certain parts of the engine frame is constructed ofnon-magnetic material, such as aluminum or its equivalent.

In order to economize in space and also to make use of the non-magneticcrank case or frame of the engine, the electric machine included in thepresent invention is so installed on the engine that the non-magneticportion of the engine frame will form the base of the electric machine.This arrange ment not only tends to economize in space, but also tendsto eliminate certain of the elements which have heretofore beennecessary in electric machines of the type set forth.

The electric machine, as will be clearly seen from Fig. 3, comprises aframe having side portions 27 and 28, connected together at their upperends by means of the transverse bar or block 29, which is connected byany Vsuitable fastening means 30. This bar forms a support for the iieldcoil 31, which in the present invention contains both the generator andmotor field windings.

The lower end of the side portion 27 terminates in an enlargement whichconstitutes one ofthe pole pieces of the machine, while the side portion28 also has an enlarged portion which constitutes the opposite polepiece. The lower free ends of the side portions 27 and 28 are providedwith lugs 27a and 28L respectively, having bearing surfaces at an angleto one another', which cooperate with similarly disposed surfaces of acorner portion of the engine crank case and serve to locate the enginecrank case and serve to locate the frame in two directions with respectto the crank case and the flywheel 22. By thus locating the frame, thegearing carried by the electric machine 24C is correctly'alined'with theengine ywheel gear 23. The frame of the machine 24E is located in thethird direction, longitudinally of the crank case by means of bolts 27band 281. passing the lugs 27 a and 28a.

It will be noted that the lugs 27 a and 28 are located on the same sideof a plane'passing through the center line of armature and perpendicularto the center line of bar 29, constituting the field core; and that thepole pieces are obliquely disposed with respect to said plane. Thisarrangement permits the armature to be brought as close as possible tothe crank case; and therefore the space at the side of the enginenecessary for the electric machine 24' is reduced to a minimum. Thepresence of the non-magnetic crank case in close proximity to thearmature will not affect the ield in which the armature is Vmounted formovement.

Any suitable arrangement may be made for inclosing the top of themachine, as by the cover 32. Y

lNhile the form of mechanism herein frame of magnetic materialcomprising an `intermediate portion which constitutes a core for the eldwinding, and side portions which terminate in pole pieces between whichthe armature is mounted; lugs extending in different planes from thepole pieces and adapted to mount the frame astraddle a corner portion ofa non-magnetic support with the lowest point of the armature locatedbelow the plane of the top of the support.

2. In an electric machine, the combination with an armature and fieldwindings; of a frame of magnetic material comprising an intermediateportion which constitutes a core for the eld winding, and side portionswhich terminate in pole pieces between which the armature is located,the side portions extending on either side of a plane passing throughthe center line of the armature perpendicular to the center of the core,the pole pieces being arranged diametrically opposite with respect tothe armature and obliquely with respect to the said plane, and the polepieces being provided with lugs spaced apart and located wholly on oneside of the aforesaid'plane, and adapted to secure the frame upon thecorner portion of a non-magnetic support with the armature in closeproximity to the support.

3. In an electric machine, the combination with an armature and eldwindings; of a frame of magnetic material supporting theV field windingsand the armature, said frame having portions thereof spaced apart toprovide a gap there-between and provided with lugs having surfaces at anangle with one another and adaptedl to coperate with correspondingsurfaces formed on a support of non-magnetic material and to locate theframe in twodirections with respect-to the support with a portion of thesupport located in the gap.

t. In an electric machine, the combination with an armature; of a frameof magnetic material supporting the armature; said frame havingattaching bearing surfaces extending therefrom in different planes andadapted to locate the frame upon the top and side of a support with thearmature 1n close proximity to the support and with the lowest point ofthe armature located below the plane of the top of the support.

5. In an electric machine, the combination with an armature; of a frameof magnetic material in relation to which the armature is mounted formovement, said frame having tures in the presence of two subscribingwitprovlslons adapting 1t to support the Inanesses.

chine upon a, corner portion of a support CHARLES F. KETTERING. with thesupport in close proximity to the /VILLIAM A. OHRYST. 5 armature andoccupying e gap between cer- Witnesses;

tain portions of the said frame. J, W. MGDONALD,

In testimony whereof we aiiix our signa- O. D. MowRY.

Copies of this patent may be obtained for ve cents each, by addressingthe Commissioner of Patents,

' Washington, D. C.

